IN any case, I would send a certified copy of the new terms to the Housing office along with same copy to the resident; Then I would confirm with the Housing Authority/Resident they received the letter & acknowledge the new terms.

@Lu Kang Thanks for sharing your opinion, which you go on to acknowledge is based on zero experience.

I just gave him a letter increasing his rent and I asked him to sign the acknowledgment of receipt and he outright refused.  

If they fail to acknowledge your claim, then your contractor license board consumer department can help you out.

@Josh Haney Even if you you have the ability to raise capital, as you acknowledged you lack experience.

The HOA won't even acknowledge that our 2005 Rules & Regs ever existed, won't provide us with updated Rules & Regs or even confirm whether a new version exists. 

If it is you and you go overboard to acknowledge the short coming and make it right than the guest will most likely forget about it and move on, if you blow it off the guest will make it a big deal and a big headache for you".

If the guest has a valid point make some changes, and in the response acknowledge you we're unaware and plan to adjust.

Can I include something in the Rental Agreement where they would sign, acknowledging the stair issue and that we are not liable? 

Remember, everyone starts somewhere, and acknowledging your beginner status can foster genuine connections with seasoned investors who are often more than willing to offer guidance and share their experiences.Local meetups serve as invaluable hubs of knowledge, bringing together like-minded individuals who are active in the same market you aim to enter or are already operating in.