Interest only vs amortized for private funding

I am in the beginning stages of doing a joint venture to buy a property. I am working with self directed IRA’s for the cash that I need. I would like to get some ideas and thoughts on doing interest only payments or amortized. Here is a sample of what I would like to do:

75k loan @ 10% with a balloon in 5.

Option A is interest only payments for the 5 years
payments= $625/month
amount of balloon = $75,000
paid to investor in payments = $37,500
overall paid to investor = $112,500

Option B is amortized over 30 years with a balloon in 5
payment = $658.18
amount of balloon = $72,430
paid to investor in payments = $39,490.80
overall paid to investor = $111,920.80

(Assuming my math is right)
If you were an investor with $75k and I came to you, which option would you choose to structure the deal and why?

If you were in my position, which option would you want?

Also, my plan is to buy a property with this money that I rehab and then live in and rent out 2 bedrooms for 2 years then I move out and rent the property out completely

Thanks in advance!

Also, my plan is to buy a property with this money that I rehab and then live in and rent out 2 bedrooms for 2 years then I move out and rent the property out completely

This portion just eliminated you from useing HMLs, or anyother private lending. NOO only.