Are there any other real estate investing books that the forums would consider essential to a first time investor?  

Open houses are typically used to generate leads, not sell houses.

A continuing resolution continues the pre-existing appropriations at the same levels as the previous fiscal year (or with minor modifications) for a set amount of time.[1] Continuing resolutions typically provide funding at a rate or formula based on the previous year's funding.[3]If you scroll down to 2025, you'll see the government is funded through 3/14/2025. 

typically with seller finance there would be some period of monthly payments and then a balloon where you pay off the balance in full. 

In any contract you don't typically need a clause saying what you CAN do, its assumed you can do anything legally allowed as an owner including sell.

Perhaps do a case study with a hypothetical deal you think is typical for what you are looking at and compare it to the alternative investments you might use and their expected returns.

Working with a CPA experienced in real estate transactions is essential here.If I were you, I’d call some attorneys on Monday if this is something you’d like to move quickly on. 

The common feedback I hear typically revolves around your accounting preference. 

Typically, we see anywhere from $600 to over $1000 per unit (maintenance and turn costs)  depending on these factors. 

These loans are short-term as you mentioned, typically 12 months, so you'll need to refinance before that balloon comes due.