I think by waiting to last minute to put things together you miss items and year end tax planning becomes problematic.

No, you cannot "write off a new truck every 3 years" as these reckless YouTube professors suggest.Prepay or delay personal itemized deductions.

The greatest control point is before that first lease.

Once those are done(by Spring time) I am going to save up $$ to lease/buy a bigger warehouse.

You can only play games for so long.Chances are your next door neighbor is an IRS agent and turns you in when your tenants blocks their drive or some other random event disturbing your IRS neighbor.ADU catches fire and your insurance won't cover you, because it was an illegal and unpermitted structure.The city inspector told the last guy not to build or rent it, and is now pissed and wants to make an example of you and just red tags the whole property and no one can occupy for the next 1-2-3 years while you wait for a hearing.Then when you get the hearing, "staff" recommends you tear the whole structure down, and if you still want an ADU, you can apply for a permit and rebuild it.Your tenant quits paying rent and won't move out and you can't evict them, because there is no valid lease and they're just your "roommate".Probably a dozen other bad things can happen to you when you do stuff like this. 

Buy the property, lease it up and refinance.One thing you’ll want to know about the credit facility is not necessarily the margin call parameters, which I wouldn’t be concerned with if there is a significant amount of equity in your investors securities securities portfolio, but what are the other terms?

You should get these things for all applicants:1. rental application with employment reference and personal reference2. credit3. past landlord reference4. check for eviction historyMost apps like RentSpree include all this in what the tenant pays to send you a report.I cosigned for my daughter and her boyfriend on their first lease.

Eric,Without going into too much detail on each line item, at first I use my back of the napkin method with a 40-50% expense ratio.

1) 20% down will allow you to do a conventional investment loan, but you will have to either:- Qualify with the new payment + your current payment- Lease the property out, allowing the lender to use 75% of the monthly rent to offset the mortgage (confirm with a lender).2) You could also do a DSR 20% down loan, but the interest rate will be much higher than conforming rates.3) If less than 20% down, you could:- Do a 10% 2nd home loan as long as the new property is at least 50 miles from your current home or near a qualifying vacation spot (confirm with a lender).- Do a 5% down conventional mortgage if you plan to rent out current home and live in the new one for at least 12 months.

How long are the leases?