1) You could ask the bank (the seller) to seller finance the purchase, and obtain the rehab loan through them.
2) If this is an investment property, then you could bring in a partner to help you acquire the property..
3) Your could obtain either a bridge or hard money loan to buy and rehab the property, and refinance after having completed the rehab.
Cove Septic Service out of Sterling MA (978)422-6905 or email@example.com has done many of these for my clients. He has been in business for almost 30 years and has the lowest prices around.
Any questions feel free to call/ text /email me
Gibraltar Mortgage (978)-840-3600
If the seller or bank (if it is already foreclosed) isn't going to obtain Title V, it would have to be a cash deal (usually investors) or possibly a rehab loan. I've worked with Cheryl Leblanc at Wells Fargo, & she was great with the rehab loan. Her number is 508-363-2205 or 508-498-7570, she can provide you with more information. If you aren't currently working with another agent & would like more assistance, please feel free to contact me at: 508-887-3291 or firstname.lastname@example.org
ERA Key Realty Services
If you can not find any bank to offer a loan for this situation (and given the current climate, that is not terribly surprising). Then there are several ways.
A) Negotiate for the seller to put the system in, and have the system paid for at closing. This is complicated, but can work for everyone, as it requires no cash out of pocket.
B) Buy the property with cash.
C) Escrow reasonable septic expenses to the banks satisfaction.
Those are the basics. Contact me directly if you'd like more information.