A savings to put deposits and another account for everything elseyou don't need separate bank accounts as accounting software will classify all of those items.

Also, what others have said, the personal touches on what is in your place (e.g. providing all the essentials instead of having people buy TP, coffee, shampoo, etc.) and the quality of those items (no tattered towels, stained sheets, etc.).  

I think negotiations on knocking the price down on inspection items on value add will be huge especially if its a flip like you mentioned.

In my area (near the beach) its mostly families and they want cabanas, baby items, chairs, coolers etc that we do not provide but I have a local vendor that delivers and picks up these items and charges a few dollars per day for each item, and give me a 20% referral. 

I would try to buy properties starting at a specific date so not large ticket items come up.

It would cash flow nicely.One item to plan for from the beginning is the exit. 

When it comes to assessing maintenance costs, one of the best approaches is to request itemized breakdowns for larger repairs.

So, if your property has all bills paid by the tenant, you will deduct from the voucher amount the set amount by bedroom count for items like water, electric, gas, etc.

Basically almost all the items you mentioned when traveling can be written off to a certain extent.

When an owner replaces or retires certain items (e.g., lighting, HVAC, or carpeting), they can claim a deduction for the remaining undepreciated value of those items.