You make the payments to the lender.Oh, and just in case, there are more items to know about when considering a "sub to" transaction but this is just a comment on the payment aspect. 

If this is a big-ticket item, you might consider legal action against Airbnb.  

Compliance items such as adding smoke detectors, hand rails, fire resistant garage entry-door and new stairs outside.

If so, are you concerned about Spain's tax system on worldwide items?

As someone who deals and talks to real Private Lenders (small shops run by a guy who lends his own capital and doesn't use big box), they have a hard and fast business model that produces the rate of return they need to remain profitable and curb the risk on their cash.So the best product for a budding fix and flip investor is the bridge loan which includes acquisition money and construction money. 

By combining our in-house teams with a focus on diversification and luxury properties, we’ve created a model that works in any market.

Paying off the notes, working to pre-emptively make repairs to capex items before they fail or become a major issue think roof, HVAC, and foundation.

But everyone has to make there own decision.By the way, I read through Tardus website, and a couple of VERY INTERESTING items popped out.  

On the contrary, uncertainty is the breeding ground for creating wealth.The core of the issue is whether you are willing to step out of the traditional investment framework and explore new business models and market opportunities.

So, if your property has all bills paid by the tenant, you will deduct from the voucher amount the set amount by bedroom count for items like water, electric, gas, etc.