I am looking into flipping a house. I basically am willing to do everything myself. But plumbing might simply be impossible if have to dig up a sewage tank. Will the city have the inspection records on archive for me to just request? That goes the same for electrical, hvac, and really any previous house inspections. Are they documented some where for me look at. Especially for an auction house.

House was built in 1972, We bought it in 1996. Never had a problem with system. Till Now Conventional System, Tank and leech field. ~1000 gal tank, concrete, with a single "Manhole" above input port. Input & output ports typical for this age like 4" or so diameter openings with a similar sized area of a concrete baffle in front of each. No filters or screens. About 75 feet away from the tank is a single vent pipe. In 2007 the county came out to check the system. Apparently there were many systems installed without any permits around the time this house was made. And many were installed with metal tanks, and these tanks are rusting out and actually collapsing. People have fell into them. So they are inspecting every system. Mine was fine tank wise. being a standard concrete tank. But they said the leech field is failing. And a whole new system or even possibly a mound system may need to be installed soon. They said this after digging some holes in the leech field area. you can tell where it is going because there is this large comma shaped area coming away from the vent pipe. Where the grass is greener and grows faster. They dug and found gray soil instead of the typical tan in this area. They stomped all around the area and said at least it's still dry, which this gray soil was. and the yard where it's super green is also was dry. That was in 2007, and it has stayed dry till now. Now you can see surface water, and it's not nice water it smells like septic tank water so the field is now for sure not draining well at all. I first saw that airation thing and seemed wonderful, then read about the horror stories of what happened to people with single tanks like I have here. Then read about the like generic like oxyclean stuff. sounds interesting and after that then run some other stuff. So anyway. looking for suggestions here how to try to salvage this system. I'm Old and disabled, only income is disability. so putting a whole new system in is not an option. Thanks for your assistance.