Or am I looking for something I can buy for cash under the limit of my heloc? 

Depending on what you are targeting you may even be able to work with a bank to have funding up to a specific limit available.Next you need to start networking with agents and other real estate investors in the area you want to invest in.

Major foundation changes, plumbing, electrical, etc would likely be off-limits.

For purposes of having a commercial space, for business credit, applications/requirements from many companies and to keep our incorporation in the state of Oregon, we are currently leaning toward continuing to rent the cheapest office unit month-to-month as our Principal Place of Business just to meet the requirements of state incorporation/other companies.I'm certain that we are not the only virtual business to face this dilemma... has anyone found a solution to this.. perhaps a method or another state that permits virtual businesses without a physical presence to be incorporated in their state?

And typically, once a bank gets notice of an offer and receives a sellers short sale package (an application some would say) this will usually delay the foreclosure date..  

Thanks @Grant Linhart for the information and perspective.I can imagine that Zillow might get out of sync with MLS, although that hasn't been my (admittedly quite limited) experience to date.

Tried Buildium, but it referred me to different platforms, it did not look very convenient.I would like to make application process/  lease signing/rent payment easy for applicants and for me.Zillow is on the way to build all the functionality, but they are not there yet. 

Now tenanted and has some operating history to show.Basically there should be a 'story' behind why there is limited info being provided and you need to find out what it is.Regardless, limited information means more guess work on your part which means more risk and so a lower price to mitigate and leave a bigger buffer.

I received an application for a veterinarian technician who is going to vet school. 

To go over the limit requires a variance.