As for accounting basic book keeping can start around 100 bucks a month at a lot of places. 

I am thinking of charging a very nominal fee say 200 bucks for the entire year .. and have weekly webinar of different subjects.. folks can tune in.. they can tune out..

I’ve owned one STR since 2005 that is occupied 240 nights a year and have incurred $1000 damage tops in 14 years.If you need an extra 300 bucks deposit to help you sleep at night, it could be costing you 20-30-40 times that in lost rents each year.  

Not as many features as some more mature systems.

Typically it will cost a point but it’s better than hitting maturity and then have default interest kick in.

There's your answer.Same for any other advertising you plan to do.Personally I think very focused marketing gets more bang for the buck for a small business. 

I'd avoid doing this in units with shared ventilation as there is a potential risk of irritation to someone's lungs with prolonged exposure, especially if the person already has existing lung disease.Ozone machine will run about 60 bucks on Amazon.

FWIW i manage our 3 rentals plus our primary myself and i'm average skill.property 01CONVENTIONAL MORTGAGE5.375fixedoriginal loan amount $ 173,750.00monthly payment $ 972.95balance $ 76,047.67maturity dateAPR. 2041estimated equity $ 509,380.61estimated maximum sale price$ 615,000.00 prop taxes $ 6,741.79purchased feb. 2004 refinanced MAR. 2011property 01Portland OregonHELOCcurrent rate 8.5original4.0original amount$40,000.00 payment$211.75 balance$29,571.72 maturity SEP. 2034

Obviously there are mature markets where this no longer stands out. 

I received a quote from Mark DeLaquil at Eon Roofing and Window. www.eonroofing.com, He was willing to talk me through the repair I needed rather than charge me a couple hundred bucks for a five minute job.