I want to buy a SFH or small Multifamily and rent out the rest.

You'll have higher debt service, but need less equity raised, so you're CoC could be improved, especially upon stabilization, if the upside is great enough. 

You need to try and guess the age or get the age and make conservative assumptions as to their replacement, or assume you need replacements right away and account for it in the purchase.I'm two months into my purchase and both my maintenance and CAPEX budgets have 10% remaining for the rest of the year.

If you don’t save enough you may regret it later.The rest of your Analysis looks ok.

I reached out to customer service, no answer yet. 

You will need to perform at least basic underwriting based on the T-12 and rent roll.There is, however, a short cut to estimate the maximum debt service.

If you're doing a reno but interviewing tenants during it because it will be ready in 60 days that would count as being " in service"Tangible property Regs were changed back in 2014.

Contact the police or an adult protective services agency in her area to do a welfare check on her. 

Idea is to drill 'spectacular service to the tenants' into my Property Manager's head! 

Also, what do note servicing companies or banks charge to service the note?