Around here, you can get monitoring for $14 month.  

Also, is there any free or low cost software that is similar to proptrend?

Freedom Soft is a good software to have for pulling lists.For more targeted lists you can create and purchase a list on www.listsource.com

Also take a look at their reporting systems - some providers are still using older accounting software.2.

My company is looking for a new property management software.

But to access the portal for your software and data, only one user can log in at a time. 

I don't want to say it because I don't want them to think they could take advantage of me or I can't monitor their work.So i am thinking of getting US address and phone number (apparently there are some services) to hide the fact that I live oversea.

My background is computer software development and I have been an internet entrepreneur in the past.

I haven't found many that constantly monitor email, so I wouldn't necessarily use that as a deciding factor unless you absolutely have to communicate by email.

And or it could be a servicing company that actually owns it.As everyone has stated just stick to your guns if you don't get it move on but monitor it..