i really can't say. it depends on how much money you want to spend, the other electronics you use, motors, props, everything. however if you buy the draganflyer frame that's half the accomplishment gone. you can't really brag about it being homebuilt that way. the frame is $75 i think and you did say you wanted cheap. i know the guy who designed the electronics for the draganflyer. one of the first things he said to me was he did custom electronics becuase he did not think it could be done with off the wall products due to accuracy issues. so you really need to focus your money on the electronics as i found out. you can still buy it, i am not saying you can't. but it seems to me that you are going against your focus on cheap. on that note however, if you are going to get the draganflyer frame or make one that is about hte same weight, go with the draganflyer props and use motors geared like 15:1 or so to bring it down to speed. if you do that you can use a smaller motor and hence use a lot less energy and allow you to use a cheaper, lighter battery and more flight time. however i had already shot for my desired weight becuae i wanted it to be more resilient to wind and it has about 6x the payload capacity of the draganflyer, but at the sacrifice of flight time. if i want4ed it lighter i could have used smaller motors, geared them down a lot more so they can still spin the prop and put on a lighter battery. the draganflyer can not really be flown in the wind. you make a sacrifice. responsiveness for durability in flight. you siad you would probably be flying it indoors so you could probably go light without a problem. one other thing though. gyros. i discovered that mine was almost unflyable without them. if you are flying indoors it is even moer important because you don't want to hit furnature and wreck the model you worked so hard on. it is important because a slight radio glitch or whatnot will affect one or more of the motors as they would servos and it can send it off in one direction or another. gws makes some that sell for $60 apice. they are really light (7 grams) but the centerpoint has to be adjusted every time you turn it on. they are non remote ajustable, (which doesn't matter if you are getting a non computer radio) and will work jsut great for your application. out of curiosity, why do you need a radio? is this your first model? this would really make a poor first model to learn to fly. if you already have a radio all you have to do is make this one the same channel as the one you already have and you will be fine. if this is your first model, however, i would spend some time on a simulator (realflight or something of the like) and fly some helis before you even try this. i have been flying for about 4 years now and it was tough for me. these models are inherently hard to fly, so to make it stable be sure to put the battery way down low and the props way up