I would build yourself up to
DVC. I started with the best value vacation club (Wyndham). There are over 200 Wyndhams, 6 in Orlando alone. With a Wyndham resale contract you can do a few nights at Bonnet Creek in a 1 bedroom for Disney. Bonnet Creek is almost always has a 35% discount during the summer when the kids are out of school. You can stay Sun-Fri for $71/night using a Grand Desert deed off Ebay (usually only costs a few hundred bucks to buy). Later on you can add a small number of DVC points to stay at one of their resorts when Bonnet Creek isnt mega cheap. Wyndham is super cheap to stay weekdays and you can also add a small DVC contract to stay during the weekend when Bonnet Creek is more expensive.
Also, it isnt hard to exchange into Saratoga or Old Key West using RCI. A week in a 1 bedroom costs me $1,050 which is much less than what a DVC owner pays. Also, when I want nicer accommodations, I can just book one of the Presidential Reserve units on the 16th to 19th floor of tower 6 at Bonnet Creek and can usually see the disney fireworks from my balcony. Those rooms are much nicer than Beach Club in my opinion.
My 5 year old daughter honestly cant tell the difference between DVC and Bonnet Creek. If anything, she prefers the Lazy river at Bonnet Creek. She actually likes Reunion the most out of them all, but Wyndham Reunion only has 3 bedrooms. There are so many amazing non DVc resorts in the Wyndham and Marriott systems and you arent tied to staying at Disney every year. Look up "Wyndham Clearwater Beach 2 bedroom Presidential", "Marriott Lakeshore Reserve", "Marriott Crystal Shores", "Wyndham Panama City Beach 2 bedroom presidential". Those rooms are much nicer than anything DVC has to offer.
My advice is to start with the best value vacation club first and work your way up to the ones with the worst value Wydham>Hilton>Marriott>DVC. DVC has the highest buy in costs+ maintenance fees of all those systems, which is why I say it's the worst value. My buy order is as follows: Wyndham (500,000 points), Marriott (1,500 points), DVC SSR (100 points). I haven't bought Marriott yet because I havent felt like I needed it yet, but I will buy it before adding DVC because I know I will get more value out of it.