small drones

Hey guys, sort-of-newb here. Do you guys know if there are any good substitutes for the drone kit QAV250? It's one of the drone kits that meet all of the requirements I need for a research I'm doing at my Uni and the complete kit is not available anywhere. With regards to why not just research...

I got pretty good at flying my Husban x4 in my basement last winter. I could fly it through hoops, land on tables, and go around a lot of obstacles. I decided I could take it upstairs and impress my wife with my flying ability (I'm in my mid-60's). So, she is sitting at her desk in our...