I'm in a similar situation as you. However, I am not SAHM. My husband makes great money and I make a nice supplemental income working part-time. My co-workers are all generally the breadwinners in their family and can't understand how I can go on big vacations every year plus 2-3 smaller vacations. But when I tell them how I do it and how I invest a lot of time trying to find ways to save and go during more inexpensive times of the year their judgement fades.
*Raises hand*
I'm in a similar situation also. My husband makes a very good salary, and I do as well working in a very flexible job. We bought our house a great price well before the housing bubble expanded, so our house's worth is still well beyond what we paid despite the ensuing real estate burst (and we're a few years away from paying off our 15 year mortgage early). We drive used cars that we pay cash for, have our kids in a good public school thanks to a good charter school system in our city, have good investments and savings, and have very little debt.
We might take one 'big' vacation a year (i.e., a week's rental with one of our families, usually costing between $1k and $2k with flights, food, etc. depending on the location). Some years we don't even do that. We take 2 to 3 small vacation a year, renting cabins, meeting up with family in nearby cities, and the like. But every three to five years, we take a 'very big' vacation. Europe twice before kids. Disney at Christmas post kids...etc. Trips that cost over $5k (but not more than $7). We can afford this because we travel so cheaply (for us) most years, and because I am frugal in almost everything I do outside of vacations.
I try very hard not to judge, because my vacations, which usually include a mix of luxury and budget, are much more than my parents ever spent on a vacation when I was growing up. I like to indulge myself on vacation, but I don't go overboard. So this year, at the beach, we stayed in a really nice vacation rental...and cooked all of our meals at home save but one. When we went to Europe (before kids), we stayed at budget hotels but spent freely on food, train tickets (business class or higher), and on gifts to bring home (this was also before extreme costs/restrictions on luggage). On an upcoming trip to Mexico, we are staying at a luxury hotel outside of a Mayan ruin for a few nights...and renting a budget cabin on the beach after.
I can afford to spend more on my vacations, but personally, I don't want to do so. I LIKE saving money on some things, and I like splurging on others. It's very personal to me.
And, while I personally would not spend $20k on a Disney vacation, I cannot judge someone who spends that on a trip simply because I have two sets of relatives (my sister and my sister-in-law) who spend that much and more on their vacations.
Both my DS and by SiL are in financial situations much much MUCH more lucrative than mine (and my family is extremely comfortable). Spending $20k on a vacation isn't something they have to budget for, to say the least. AND, both have numerous kids, which tends to drive up the cost of vacations, with airfare often being the bulk of vacation cost. And though they spend a lot of money on their vacations, they often are not splurging...my SiL's recent trip to Europe with her entire family probably cost upwards of 20K (she only mentioned that it cost them $10k for plane tickets), but they stayed in mid-range hotels the entire time and ate most of their meals from street vendors, with one or two restaurant meals thrown in.
It's all relative.
I know that by posting on the 'budget board', people open themselves up to more scrutiny. But 'budget' is different for everyone. People making upwards of seven figures a year can (and do!) watch and carefully regulate their spending just as much as people making 40k per year...they just have different benchmarks for how much they spend given their different incomes. What someone wealthy spends can seem extravagant to someone that is barely making ends meet, even if that wealthy person's spending is frugal considering their overall income.