I feel like there will be lots of people that are ready to get our of their home offices!

If you supply the machines, I recommend increasing rent $100 or so to compensate for the purchase and maintenance. 

I will be living in the guest house, while renting out the main.Both units are without washer and dryer units, my question is, do I supply them in the main house; or let potential tenants figure that one out?

Provide the supplies.

Some people are sending supplies (clothes, other needed items like school supplies, food for humans and pets, etc). 

pid=2141Houston Real Estate Highlights for December and Full-Year 2024:-Following two consecutive years of declines, single-family home sales rebounded in 2024 with 85,163 single-family homes sold compared to 84,038 in 2023 an increase of 1.3 percent; -Total property sales for full-year 2024 were statistically flat at 101,864 units while the total dollar volume increased 3.1 percent to $41 billion;-December single-family home sales climbed 16.3 percent year-over-year with 7,162 units sold;-Total December property sales increased 13.6 percent to 8,478 units;-Total dollar volume for December rose 20.5 percent to $3.5 billion;-The single-family home median price edged up by 1.3 percent to $334,290 while the average price increased 5.0 percent to $425,150;-Single-family homes months of inventory expanded to a 4.0-months supply;-The townhome/condominium market experienced declining sales throughout 2024, and in December, volume declined 5.8 percent, with the average price up 2.5 percent to $268,152 and the median price statistically flat at $234,250;-Townhome/condominium inventory improved from a 3.5-months supply to 5.4 months.

He claimed if he didn't get the money he could not buy supplies to complete the job, which would be done in a week(I knew this wasn't true). 

You can get around that issue if you have a dedicated home office space that is used for the operation of your rental business. 

With the fires, labor and materials are going to be in short supply.

Personal residence that has a 2,000 sft office, kitchen and lounge area ( for entertaining vendors, clients and prosepects).