I can afford to invest in B properties with larger down payments but I guess it means I may be doing more like 2-3 deals per year than 3-4.  

I was in a similar position a few years ago, but fortunately got married and our combined incomes helped us qualify for a larger house hack.We're on our second one in NOVA, Alexandria to be exact, and instead of rent by the room, we are renting out our walkout basement on Airbnb to monthly guests.That said, we have a number of friends doing well with rent by the room across NOVA, though they're purchasing homes with 5+ rooms or finding homes that can be renovated to include that setup.I'd recommend attending meetups such as the one I cohost, NOVA REI or Cashflow Breakfast Club or any of the others to meet those who are house hacking.

That stopped when I stopped using third-party cleaners, but I also started to only leave enough for the stay.I use a small Dawn hand dish liquid that I fill between guests and larger hand soap dispensers in the bath and kitchen that I fill between guests. 

What I've realized is that a lot of these companies that do pay for housing stay in the larger apartment complexes because the companies pay for it.

If you stick with the larger down payments, you’ll have more stability and less risk, especially if the market shifts, but it will slow down how quickly you can buy additional properties.

So that the tenant rent is providing a larger amount of return of capital. 

By this I mean much larger home do not rent for significantly more than the smaller home in that area. 

However, if you have a more extensive portfolio or plan to become larger in the next year or two, I would look for a double-entry system that allows bank reconciliations.

From my experience investing in mid-tier and luxury hotels much larger is you need about 70% to make ends meet, you start getting happy about the investment about 80% and around 85-90% you fell like you are a genius. 

The larger the property, the more inclined I am to have a property manager.