The answer will vary a bit depending on the amount of the loan and the property. 

The minimums actually vary widely in both categories.

For STNL fresstanding buildings even though it is absolute NNN you still take into consideration what costs the business will be occurring other than the rent they are paying.You look at rent to sales ratio and also EBITDAR .Strip centers it is base rent plus CAM but what you can charge for cam will vary based on the leases that were signed and how they were worded.

We all vary depending what you need. 

It seems to me that both can have varying levels of involvement by the property owner.

Each type, class and style of apartment is different and operating costs can vary greatly depending on what part of the country you are in.This is a very short answer to a huge topic and question but there are lots of resources out there to help you gain a much better in depth understanding of the topic.

Some lenders offer programs for 'delayed financing' which is really utilized for investors who purchase a property with cash outright (typically need to for sheriffs sale or REO when no interior access is available or time frame to short to get a loan), and then they will actually refinance you up to 90% of original purchase cost + rehab (Experience & Credit will vary your rate and LRTV's).

Insurance varies by value, construction type, age, location etc.

I understand it may be too far down the road for the seller to be able to make decisions and I’m sure the rules vary a ton.

I am seeing interest rates varying from 5.5% to 7.5% on a 30 year fixed depending on your credit score and LTV without showing income.