I've personally never used opportunity cost as an expense, considering it is more or less intangible.

I bought a house that cost a little more than the LoC amount, used my savings to get it rent ready and rented it to a tenant.4) Every property is different. 

It's something that they will actually hold onto so it should give me a decent amount of impressions for the cost.    A

Separate loans will cost a lot more, since you'll have four full sets of closing costs.

The inspector said this could cost a lot in the future and is likely to cause further problems.

With that being said, Spain is a great market to buy into right now, particularly along the Costa del Sol - a glut of supply and grossly-depressed prices make for some excellent long-term appreciation gain, as well as an established and well-entrenched demand of STR in the summer. 

When you find a good property management company they will care, it may cost a little more, but in the long run they will get you higher rents and lower occupancy.

The downside is they are about the same cost as a sheet of good-one-side plywood and only come in white (or, at least I have only ever seen them in white).Another option is stainless steel panels.Go to a commercial kitchen supplier and see what other options are available.

For example, the consequences of not knowing restrictions on the land upfront or geographical limitations (fire code, permitted use, moving dirt/excavation, etc.) can cost a fortune when it's too late.  

It may cost a little bit more to use a professional, but in my opinion it is well worth it.