What I do not want to happen is to be accused of taking advantage of someone with a disability, but I truly think this is the best solution for him.How should I go about this? 

Telling them what to do is a deep legal battle which noone wants to touch, you can't really prove it, if you're not monitoring them by the minute/hour, then I don't believe it is solid, safe bet on that is give them a clear and detailed scope as part of the contract (no employer-employee engagement there yet), and then monitor progress, everything you don't like, you issue a correction notice.

Discussing the needs of the client, and finding a solution that meets their specific needs goes way beyond just "rates and points" questions most RE Investors ask.

I understand there will be questions regarding the future,,, if one wants to sell and the other doesnt etc. and all i can say is we have figured out an agreeable solution and the future is not an issue.

Lend2Live should get you a solid 85-95% solution. 

Even wiped down all the walls and floors with a vinegar solution which helped, but still not enough.

We are trying to creatively find a more affordable solution that will allow us to meet our goal of starting the build later this fall.The Problem: A section of our lot had a swampy area.

Also, if you scale and want to outsource your bookkeeping, a cloud-based solution will work a lot better than a local, on-prem solution. 

They should strive to provide solutions that are tailored to each customer's unique situation and preferences.Use a customer-centric approach: Agents should adopt a customer-centric approach to their work, meaning that they prioritize the customer's needs and preferences above all else.

Last; only honest, ethical, above-board solutions please.