I am from the UK and would like to start a business helping British investots source US rental properties.

If you are in an area with high immigrant population it's common to have no credit or even ss number.

If you rent by the room, you could list it on a site like Padmapper.comIn the DMV area, we have a lot of immigrant workers who need to establish credit, and if you're flexible, that is a niche that needs to be served.I have one person right now in this situation, and without a lot of cash to put down or a guarantor (difficult for immigrants), they can find themselves in a tough spot.Likely, you can charge a bit of a premium if you are being flexible on credit. 

Hi,I'm an H1B visa holder, I'm concerned that  involvement in rental properties will negatively impact my immigration status. 

Both sides of my family are Italian immigrants, a few generations back.

I haven living as an expat here in UK, working for U.S.

I am submitting my US tax return for 2011 & I have a house in the UK which I am renting out.

I live in New Jersey, work in New York and moved here from London, UK about 3 years ago.

With the new changes in immigration policy and less fear of deportation for many, more buyers and renters will feel empowered to speak out against bad lending and land lording. 

No, I have seen 100s and 100s and 100s of properties purchased from out of state and country ( Israel, France, Belgium, UK ) investors, that have never been to the city.