This is just my personal opinion and may not reflect how everyone thinks however, Windows 7 home does not support RDP terminal services… it also does not support multiple concurrent connections you have to hack it for both. I do not know that I would trust a setup that requires every user to be a full admin just to run an rdp session. Sounds like a possible disaster waiting to happen.
It is a business environment everyone can make their own decisions but I would highly recommend getting the right systems in place and not rely on hacks/risky alternatives for your business just for sake of saving a few dollars.
All that said my recommendation for a true RDP setup in a business environment where speed, reliability, and security matter would be to invest in your infrastructure wisely. For the server PC I recommend investing in Server editions of windows so it can support RDP natively and multiple concurrent connections out of box without hacks or license violations. It also handles RDP and server environments a lot more efficiently which is important for a business.
I make a a lot of posts similar to this when I see these sort of work-arounds because I feel it is important people understand this. I see a lot of mistakes in small business with computer infrastructure just because they think they are saving money. It almost always comes back to bite them later and they end up spending more$.
My recommendation is Windows Server 2012 Essentials edition. It supports up to 25 concurrent users.
OEM Version