Variety of 1 hp - 2 hp in that general style apppear on cl all the time, some are good deals, some aren't - you should be able to get one in good condition at a reasonable discount if you decide to go that way.
You can shorten the overall height with a canister filter and a smaller collection bag - but the canister adds some $$ as well as much better filtration and collection performance.
Attic would be cool if you get enough cfm to pull that distance - one potential downside is - When is the collection bag full? How will you know?
When I started woodworking, I didn't know squat. I have progressed in 30 years - now I do know squat.