She's expecting to receive a job offer, currently unemployed but has  a good payment history.

I currently do not have any student loans, car payments or other debts besides my mortgage. 

@Jena VailThat is how we prefer to sell owner financed is the 10/10/10 rule(10% down 10% interest for 10 years)We have modified this in instances for larger or smaller down payments or changed amortization but had a ballon

Let's look at your situation LOGICALLY:)OPTION #1With your combined $100k for a down payment, you could buy a $1M+ SFR home in California. 

2) You did not ask for a PAYMENT PLAN IN WRITING WITH SPECIFIC PAYMENT DATES & AMOUNTS AND COPIES OF PAYCHECKS!

I used these methods in combination to add a new account to track personal and business (non-rental) expenses from January 1 this year. 

You should also be putting in a buyer who is very financially stable and will be competent in taking over the payments.

If you mail, be sure to mail to the correct address which can be found on the instructions (first result on google if you google "form 4868")If a payment is due with any of the above, you can include a check with your mailed form, or you can pay directly through the IRS DirectPay system and select "extension" as the reasoning for the payment.

Also, at least in my area some handyman will do work and accept a payment plan, so maybe see if this is possible in your market. 

DSCR loans are based off of down payment, credit score and either actual or market rents so it helps to supercharge an investor's real estate goals and net worth.