People often make the mistake of applying for "toy cards" ( department store, gas cards) or even worse, subprime cards.

Neither my dear contractor Dave nor the contractor who I used liked the idea of a pocket door. 

The cost of acquisition, deeply itemized to make sure you have a real number, acurate analysis of market lot rent potential , and cost of engineering srudies then install or rehab of wells and septic install, cost of new or upgraded electical hook ups,  roads, then the multiple meetings with county zoning and water departments before you even start the rehab.

She has a good job at the department of health in the city.

You will wind up speaking to the commercial loan department so whether it's through your LLC like I do or wether it's in your personal name it won't matter

For example, is there a local building society that typically tracks this info, or does it require calling carpenters, local planning departments etc?

I agree with @David Krulac - hopefully your property is in one of the 2% RTT areas rather than one of the 4% or 5% RTT areas.The imputed property value used to determine the RTT amount can be found by taking the tax assessed value from the tax assessor, and multiplying (or dividing) by the common leveling ratio that the PA Department of Revenue has posted at their website, for the year and month of the transfer (the values in their table change over time).Once you have that value, and the tax rate for that location, you can figure out how much this screw up cost you ;)

Could you manage a department at a company whose workers were of this demographic?

Dear experienced, and even newer multi unit investors:If you could go back in time and give yourself advice, what advice would you give?  

Then, the housekeeping department will bring you as much as you want, without charge.