I didnt realize there were so many restrictions in Oceanside/Carlsbad.  

Some HMLs have lending restrictions by state.

Then there’s city regulations—some places heavily restrict short-term rentals, so you’ve got to check the rules.If you find the right spot and automate stuff (guest communication, cleaning, etc.), it can be profitable.

There are also 'mezz' lenders (typically for larger transactions) who will cover up to 90% CLTV and require you to bring the remaining equity to the deal, and additionally there is Gap Funding in the form of unsecured personal debt.The latter can potentially be the most expensive option, but allows for true 100% financing as there are no restrictions for how to use these funds, as they are unsecured, and generally obtained through personal credit, income etc (since there is no collateral for obtaining these funds).

Shopify might feel restrictive because it's not built for the complexities of managing properties or handling booking systems efficiently.

I have heard there are FHA construction loans but that they are pretty restrictive and do not allow for multi unit construction.

I would also recommend paying attention to the landlord restrictions, rent control and overall laws as it relates to owner/tenant relationships.

Of course, with all things, the answers to all these matters will depend on the circumstances.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

As with most municipalities and jurisdictions, the evolution of the AirBnB market has spawned regulation and restrictions on where, when and how a STR can operate.

The City of Portland, and Multnomah County are more restrictive than most of the state for instance.