I remodeled the bath in my 73 year old home last year. The shower was freezing up and I got a couple guys to go into the crawlspace to check it out. They found completely dry rotted beams and subfloor and were surprised I didn't fall through the floor. The crawlspace is SO small that it took a 10 year old skinny boy to fit into the space. How can I fix the support problems? Is it better to just fill it in with concrete and build the bath in another room? I don't have endless amounts of money to work with, so I'm looking for a solution that won't break me. HELP!