Then 10 days after the letter is received and you have proof of that, you can proceed to court filing, etc. 

Specialities, including contracts under seal, have a 12 year period of limitations pursuant to Section 5-102 of the Courts and Judicial Proceedings Article of the Annotated Code of Maryland.

The deceased passed in 2017 and probate has been open ever since with extensions filed and the court has notified them to file and both POA's have missed the deadline but an annual for each year was filed to bring things current.

I asked the court to reopen the case as I was not served notice to appear.

I only by liens on vacant land in my self-directed IRA and I’m looking for partners (contractors and finance) to help me develop Coliving houses, Blocks and Cottage Courts on the lots.

If this qualifies as a habitability issue (it may in the South) you may be able to set up an escrow account with the local rent court and make your payments there instead of to the landlord.

And, if this were going to court, would they consider the overall work done and reasonable compensation for work completed (even though some of the work was lefft not finished) or would they side with the contractor and say the agreed upon rate was $40 and his men were on site?

So even if you pick a state with stronger protections like WY or NV, the cause of action arose in the state where the tenant fell, so likely that the court where the accident happened would have jurisdiction.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

PA doesn't even limit late fees by statue, but I suspect there are court cases on excessive fees that have set a precedent.

The owner filed notice to quit, I believe a 30 day no fault, and has entered the complaint with the court as of 9/16.