At the moment this is all speculation - since I am currently living in a 1000sq ft condo in downtown Boston. I have no space for a 1/5 scale buggy and will end up being divorced 2 weeks after getting married if I ever brought something that big into the house.
Can't wait until I am out of the city again and have some space to play more.
I may run mech brakes, but I don't really race so it is nice to have forward and reverse at times.