What kind of planning do you do before writing?

I want to write an LOI up to the current owner but am concerned about these issues and I know he doesn't want to deal with it.The next issue is the tenants.

Obviously you would want something in writing with the owner to reflect that. 

If it has been stressful for you writing checks, think how stressful it has been for your tenants having frequent issues.  

Just writing a post trying to network and maybe get some tips on how to get started.

Hello QuentinWelcome to BiggerpocketsDuring downtimes you can read and listen to audio on real estate investing.You can also explore the relations to constantly look at deals to get up to speedOther activities you can carry out include: Make calls,follow up,ask for referrals, view houses,write offers

I've seen posts where people were addressing issues on how to file tax when house hacking.So I guess I can't write off the mortgage interest as expense but he can?

Appreciation, mortgage paydown, cash flow, tax write-offs, etc.

Yes you get all depreciation write-offs etc as just an individual holder, and note your accountant will likely need to file a Delaware tax return each year for your rental income in Delaware, but this is usually easy and cheap. 

Hello Alicia,In my opinion, as long as the proper expectations were set and everything is in writing, there are only pros to partnerships.