If I am hearing you correctly, you have found that the wear and tear in a manufactured is similar to that of a standard SFH but I may have to dig a bit to find the right contractor?

They just dig a hole at each end of the line. 

Dig a little bit deeper before jumping head first. 

That still may not be a deal killer, because you can remedy that, but as mentioned, you will likely need to get a permit to dig a new line or pit.  

It's a forum like this so you have to dig a little bit for what you need. 

Hello Guys and Gals,After viewing a home in an area that was not right I decided to dig a little deeper and found a property that looks great that I would be interested in viewing and potentially making an offer.

I'd dig a little deeper.

Depending on how far the existing chimney footing sits in the ground and where the flu exits the building, you may need to dig a well and put in some drainage (crushed stone) ... but likely not.

Austin go to your local supply store and ask the guy behind the desk can he refer you to two guys that can do a heavey up .He see every electrican in your area and he knows who is who.The second trick you can look up permits in your area on line and see who pulled permits for what you want done go up and ask the owner did they do a good job there name and # or on the permits.or last if you see a local building inspector he can tell you real quick and tell you who to stay away from.I am a GC were out there you just have to dig a little to find us.

I would dig a sump pump pit to see if this quick fix works.