Most large corporate companies will not do these shorter periods and will only allow week-long or 10-day rentals, so usually a smaller company will be more workable on this.

I should be allowed to borrow “unlimited” money as I’ve proven an ability for over 40 years of paying every single debt I’ve ever taken on, on time. 

Otherwise, a DSCR loan will allow 15% down and have slightly worse rates.

Or does anyone know a lender that will not require wind cover and just allow hazard and GL since I also have to renew my loan 

I acquired this property with a 20% down payment and an 80% seller financing note with a 2-year balloon to allow myself enough time to stabilize it and get longer-term commercial debt on it.Over the last 7 months, I was able to raise the other 4 units to market rent and lease out the larger 5th unit to another state government agency on a multiyear lease.

So, getting these dimensions right may be more important than allowing for greater thickness of insulation.

Becoming an affiliate will allow both ends to track KPIs and monitor deal flow. 2.)

I have enough cash to put 20% down but this only allows me to purchase a home that's cheaper than my current one (even after counting my current home as rental). 

@Tom Server some investment companies will allow you to borrower against your holdings.  

I can advise on the financing part in terms on how to structure your loan and making sure you have an exit strategy that will allow you to continue to purchase your next investment and continue to rinse and repeat.