Proper documentation and consistent reporting are crucial to ensure compliance with IRS requirements.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Since most properties on the market here have inspections and a disclosure packet up front, it will be difficult to get those documents without MLS access. 

So creating all these funky financials is great, but if you are using those in a presentation that information should be in the PPM or an official document as if someone is making a decision based on that - it can come back to bite them.

Document all of what you do if you are going to get it done for them, and/or if you cut them a check then make sure it is in writing that it was all done and they cannot come back to you at a later date asking for more money/mitigation.  

Potential ChallengesPrepayment Penalties: Check your FHA loan terms for any prepayment penalties or fees for refinancing before a year.Appraisal Risks: Ensure your property’s renovations are well-documented to support the higher valuation needed to pull equity.Lender Requirements: Commercial lenders may scrutinize your LLC’s financials and operational track record.

And in most cases, reading a receipt and knowing which property/my management company it is tied to (done automatically by separate accounts linking to my software), even if I don't do a very good job documenting, I have enough to go back and justify almost any expense.  

I'm Diogo Capela and it would be a pleasure to meet you and give you some insights on the portuguese real estate market.In fact, I can send you some documents with information and websites that I believe are relevant to you.

Definitely not doing the work myself so it sounds like resale value won't be impacted if I have a licensed person fix the issue and provide evidence/documentation that it was done correctly.

His documents are comprehensive & they make up the majority of the ones I use in my business.