@Chris SeveneyThey did not support the wall correctly and i am going to get basement jacks as well as hire a structural engineer to asses and tell me the long term solution.As far as the sewer line repair,  comps are around 250K,  I am purcashing the house for 85K, i have budgeted 135K so far(without this repair)  I  have a total of 150K renovation budget.

. - here are the links to USPS mailbox "standards". https://www.usps.com/manage/mailboxes.htmhttps://about.usps.com/publications/engineering-st...http://pe.usps.gov/text/dmm/D041.htmI try to avoid putting any names on a tenant's mailbox, but I don't prevent a tenant from doing do themselves.

I am an ambitious retired network engineer who started that career after closing down my first business which was in the automobile industry، sooner later I developed an interest in investing in my property and other ones by using Airbnb. it was a really funny story to begin but you know that after one year I would be managing 33 luxury apartments distributed across one of the fastest growing communities in my country.

I would get a structural engineer to the property.

I also have contractors, engineers, investors, lenders, etc. that I pop in on when I don't know the answer to something, and others that just have different experience in a niche I want to learn about.

What ever timeline a builder/architect/engineer quote you add 6 - 12 months.

They received a quote for 22k (engineer reviewed) but want to sell. 

I'm just creating a search engine trail with this post. :-)I originally requested $20-25,000 in funding preferably cash.

Explain that Search Engines have to continuously change even if the algorithms stay the same.Congrats on your success. 

I'll throw in a few more things to consider:Property Assessment:Structural Engineer Evaluation: Before proceeding, hire a structural engineer to assess the extent of the damage.