Anyone know companies who create amortization schedules?

[Bryan Stell]

My Wife and I are looking to buy a commercial building to move her Physical Therapy business into.

We have 2 family members who would pay large portions of the cost of the property. I am looking for a service who would create customized payback/ amortization schedules (For peace of mind) for the family members. IE 5% APR on a 200k loan over 15 years.

Any ideas?

Thanks!