Cash flow often being reinvested into property expenses, which can make it challenging to rely on alone.

High demand and still relatively low entry costs. 

Duplexes are cheaper to rent and expenses are becoming difficult for the average tenant.  

However, i want to address placing a tenant.My market has a low vacancy rate.  

Less than 10 minutes and they are done.Self Managed, Low Volume - these folks collect the same rent every month, have minimal expenses beyond their mortgage and find it very easy to collect the few documents they have to report it. 

On the lease, he'll pay me $100/m over my HELOC payment and all other expenses, including the refi cost, inspections, title work, etc... 

Some places require you to change the water between guests.I've never heard of a saltwater hotbtub.Sounds more expensive to purchase.

Yes, Spain has a wealth tax but it's above €2 million taxable income and the rate is low so it's not going to kill you.3.

If my spouse wasn’t opposed to moving I would try to buy a new house hack every 12-15 months and use low down payment owner occupied loans for as long as it made sense.

We have managed to build a solid liquid nest egg, but I'm hesitant to lock the majority of it up in a low LTV mortgage on a really expensive primary residence.