Besides the constant maintenance problems you at times have to consider what happens when the ref goes out for a few days and spoils the tenants food. 

Too few details to answer (Of course this varies county by county, all questions could be answered by reading the (zoning)/building code and/or clarified with a visit to the county planning office).but some clarifications because: lots of things are "tiny homes" but what you describe small houses "on permanent foundations" needs to be clarified , tiny homes could be:-stick built, see below. check your county code/planning dept-stick built cabins/recreational, a specific zoning and potential occupancy/etc restrictions but worth looking into where the zoning allows for it -hud manufactured homes (smaller singlewide perhaps 400sq ft 600sq ft minimum)-non-hud park models (on axles), ansi standards- other "RV's" built on a chassis:  organizations, state agencies, etc - will certify factory built (or sometimes inspected professional built) tiny homes on chassis - to whatever standards ansi, riva, dot/ l&i?

I am looking to start off house hacking but with so many listings I would like to know if there are some strategies for organizing home information (real estate software, excel set up, hand written, etc).

OK after an expensive lesson Reipro lead generator data is pretty sad I apologize for even bringing it up, But the added perks like contracts and organization tools are cool.

I did not understand when I joined that the Womens organization had two men as owner/ leaders? 

They found a cavity in the foundation with the cash mentioned in used twenty-dollar bills with random serial numbers wrapped in opaque plastic food wrap, and a sealed Home Depot Homer bucket behind it.

My only issue with it is that it requires a larger “organization” and management and administration of that organization.

In my opinion, i dont think the price can get lower than now which means that from here they will slightly start going up, I reckon it might be very slow, but unless you are in a hurry to sell, i think it can be a very good investment with the years; by now, apart from enjoying the great enviroment and food here, you can also rent it, in high season you can get really good money by renting to foreigners (especially English and Nordics) that follow the spanish sun even in winter!

Make sure to open a separate business account to keep your finances organized.

Feel free to inquire about their staff qualifications if it's a larger organization.2.