People responded by explaining that residential mortgage lenders are looking for US-based customers, who have their residence, income and assets in the States.How do they view foreign debt?

Personalization: Buy box customization and tailored investment strategies based on my individual goals, preferences, and risk tolerance.

They offer interest-only loans, don't charge for appraisals unless the deal actually closes, and have great customer service (they actually close on time unlike some of the lenders my clients have chosen against my advice over the years who ask for my time for underwriting the day before closing).

I know nothing about ME law specifically but I assume that can be done in accordance with local customs… Either by obtaining a court-certified copy of the original easement and re-recording it with all of the required signatures OR recording a confirmatory deed of easement which spells out the error and corrects it by including everyone who should have signed the original. 

If they are able to remove the term it will be dependent on the loan underwriting requirements, not because they want to keep you as a banking customer.

Extended kitchen cabinets to ceiling to help look custom, changed all light fixtures, added cabinet hardware to cabinets, added accent walls, added swing to front porch.

Ironically, platforms designed for real estate (Zillow, Apartments.com, Rentler, etc.) produce very few tenants for me, compared to FB Marketplace (and I also find a lot of their functionality to be user un-friendly, from the landlord side). ...you'd think that platforms custom-made for real estate would make the process a snap for landlords, but it takes me a lot longer to post and manage rental listings on Zillow or Rentler than it did on Craigslist.

My plans in Charelston SC that tend to be custom will take 60 to 90 days and cost 10k or so. but they still get check sheets to..

We have a lot of customers at the moment who are strongly considering lifting their homes.

That's great that the bank who currently holds the note wants you on 20 year or 15 year amortization, they view you as a captive customer, they don't have to earn your business any more, as far as they are concerned.