You asked this question already. You can do it as cheap as you want but it depends on what you are willing to give up. If you provide a budget, people could provide better information. "Economically" to someone that makes $1M a year is not the same as someone that makes $30k a year.
For instance because you provide absolutely no other guidance, a 6-night stay May 14 - May 20th, at the M Hotel International Dr. is $203 for the week. RT Uber would be about $25 per day x 5 days = $125. That is $328 + the cost of tickets. Then, you have to factor about $125 RT from MCO. Now you are at ~$450 + tickets + meals.
That is about as cheap as you can get. If you want more information, provide more details of what you are looking for and the budget you want to be at. Your tickets for Disney will be ~$1,400 and Universal will be $655 for 2 Parks 1 Day pass. Factor in about $25 per person per day meals (and that is going absolutely cheap), you are at $700 for meals. So, $200 + $125 + $125 + $1,400 + $650 + $700 = $3,200.
Not sure what you consider economical or "vacation". However, the hotel cost would double if not more because I would never stay in a place like that. The other costs have no place for savings. You have to decide what is important. You could skip US and save $650.