@Juan BravoCheck out the people @Dennis Rodriguez mentions.If a bank won't be involved, make sure you do a title search ("Estudio de Titulo"), make sure property taxes are paid and I would get Title Insurance (just to be safe and it's cheap).I don't know about any specific problems/issues/concerns with the owner financing part.

I know a South Jersey investor who owns some rental properties in Delaware due to the stark differences in taxes.  

In both instances, the intrinsic value will be the same at the point in time the option is sold.As for the optionee petitioning to annul the option, the full fee - minus any legal costs associated with (de)registration and processing the release - would be refunded (we would not reduce the amount by the time value expended ... this was suggested by counsel for simplicity).    

The rent control situation is a problem, luckly, mine will de delivered empty.

Does anyone know a Spanish fluent attorney that practices landlord/tenant real estate in Delaware?

The risk to the US dollar is increasing and the value declining as the de-dollarization of the global economy accelerates. 

I use Corner Escrow, Christy De La Torre and First American Title, Noah Prestwood.Good Investing...

You have to make time for yourself and turn it off to de-stress.

@Wendell De Guzman Good advice!

@Wendell De Guzman  Hey Wendell nice to hear from you!