It is very dependent on your place, location, and target guest, but I have built my properties' social following to almost 50,000 followers, with 65% direct bookings from that.

In fact, I've made up a few of my own that aren't in the book.

You should never invest in an area you know nothing about or at least have someone you know and trust who can guide you there. 

Definitely should check out J Scott's book on estimating rehab costs: https://store.biggerpockets.com/products/the-book-on-estimat...I wrote a long article a while back on due diligence that would also be worth reading (well, at least I think it is): https://www.biggerpockets.com/blog/due-diligence-ultimate-gu...

About 3 years ago my freshman year of high school I was told if I was to house hack after high school I could own 5 properties in 10 year's.I took that to heart and have been saving money since then reading books and listening to podcasts about finance, business and real estate.

I help my clients manage their books as well.I was able to help use Buildium for all accounting records. 

That rule was always more of a quick filter than a hard guide, and with today’s interest rates, it’s clear that the math just doesn’t hold up like it used to.A lot of investors are tweaking their approach—some are looking for higher rent-to-price ratios or shifting to more creative financing options like seller financing or adjustable-rate mortgages to help with cash flow. 

Here's a link to a tenant's guide for CA. 

Id love to connect and guide you with any questions you may have!

Podcasts are great but some books will help to get clear view on what you'd like to do.