If you're planning to eventually go from single families to MFs, then go with a web-based property mgmt software that will scale with your growth.

This is how the big credit companies, magazine companies, etc. do it because they can simply update their database and keep sending info to a past customer/warm prospect, versus spending 10x as much to get a cold lead to become a customer/warm prospect.Here is a screenshot of one of my returns...You have to send first class for this to work.

but even so, I'd love to find something that's either web-based or compatible with the Mac system.

Lots of us have good primers on our web sites.  

I would suggest to start checking out the Real Estate section online of the Philadelphia Inquirer and Philadelphia Magazine.

@Sean OToole, On the Propert Radar web version, there is an export option Wise Agent. 

I am interested in participating in like discussions and/or web conferences from afar (being in Spain, it'd be a fair stretch to attend meetups in NY).

You should be able to find tax info on the appraisal districts web site.  

From web designs, to app development for property management companies, you name it!

Hi Eugene, I found a previous discussion here: https://www.biggerpockets.com/forums/49/topics/165...Soundcu shows a limit of 90% LTV on their web site.