Your challenges are significant.
Credit score of 598 is difficult but not impossible to deal with.
Now, a $45,000 mortgage does present a problem.
Most traditional lenders will find the cost of processing the mortgage will exceed any profit they can make.
What can you buy for $45,000?
A home requiring SIGNIFICANT repair...you don't have the resources to complete the repairs
A condo? Most lender will not finance a condo without a dramatic down payment.
A manufactured home? Very few, if any lender, will finance.
I would recommend you stop into a lender in your area who has a history of investing in the local economy through small business loans and mortgages to local buyers. Consult with their lending agents to confirm you are on the right path and please choose local lender rather than than Bank of America, Citi, Wells Fargo, Chase or Never Ever Bank of Clearwater Fl. Simply enter your zipcode or city and chose a "A" or "B" graded local lender.
Best of success to you,
Annette Lawrence, Broker/Associate
Remax Realtec Group, Palm Harbor, FL