For estimating rehab costs, try using the BiggerPockets Rehab Estimator Tool or get quotes from contractors through sites like HomeAdvisor or Thumbtack.

.), 1 stored in a cloud environment (and secured) and 1 off site.

Go to Etsy and search for "rental property tracker," and you will find hundreds of nice spreadsheets to track 10-20 rentals, usually for under $10.Software has extremely helpful features like online payments, marketing syndication (click a button, and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

We are listed on about 6 sites and besides the typical Airbnb and VRBO, we've had success with Travelstayion as well. 

These have ACH collection systems build in along with numerous other benefits to make your life easier. 

I don't really come on this site much anymore.

May your bookings be as plentiful as you wish, your guests be low-maintenance, thoughtful, and honest, and your positive reviews numerous.

Therefore, I try to find a more user friendly web site that can distill the above into something that is readable.  

I got a quote for 8K sft retail from a construction company for around $120/sft, this includes site prep, utilities, metal building erection, exterior finishes, interior insulation etc (basically build the shell from scratch).

There are training sessions you can sign up for on the site, these are live with no recording of the sessions.