Now with Covid we do not even travel to the U.S. so will use Facetime to see the progress I also get reports on our internal system for all my our  contruction activities.

I want to develop a system where I can handle the maintenance and repairs through my phone without being there in person.

I have read mixed reviews on investing in this market due to pro tenant system, high vacancy and very slow price appreciation.

Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

I like reach to start and REI Reply once you have a system in place 

For example in California there is a 10 year structural warranty by law (and shorter warranties for different systems).

What are the pros and cons of using a Land Trust versus an LLC for investment properties?

Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.

So this is what I want to do and then build my own systems/sales team.Any advice or experience is appreciated.

If you can't find a single review, that may be a sign; albeit, some smaller lenders with their own fund or private money may not have a ton of reviews versus the bigger lenders.