OK I have some space restrictions to deal with on a friends house. No trees and a small lot, and HOA restrictions prevent outside antenna erection. The home does have an attic but is only single story, so height is another restriction he has to live with. He wants at least 40/20/10 which will be a challenge because his attic space is roughly 60 x 35 I see two options either a Doublet cut to 66 feet and feed with 450 Ladder line, or a Fan Dipole with 3 elements cut for 40/20/10. My thinking is Doublet is the best option. Either way interior space with a length of 60 feet with 66 minimum requirement for either Doublet or Fan Dipole. At least with a Doublet he can get more than 3 bands but not sure how to handle the missing 6 feet. Make a 3-foot "Z at the ends? Whatcha say?