Celestrons have come down in price to just above $200. (Amazon.com).
I would like to buy a used one for less than $150.
If they were 45 degree EP binoculars, mounting them and viewing through them would be a snap.
If I had a pair without 45's this is what I would try:
Mount a fixed 45 mirror in front of the objectives and proceed as though the EP were 45's.
I have seen Skywindows etc. but I have not seen this idea.