You could get business credit lines which are nice to have more on the flipping side to cover unexpected costs.

Currently, 60% cannot pay $1,000 unexpected bill and 40% cannot pay $400 unexpected bill.

Keep a reserve that allows you to handle vacancies, unexpected maintenance issues, and all the other problems Landlords inevitably deal with.

2) Processes for and influence on contractors when entering home--putting residents at ease and ensuring my units are cared for.3) Proactive communication with me and the tenants.4) Procedures for working with distressed tenants to keep them in the unit, get them over the hump and keep me from an unexpected turn and lease-up.5) Professional leasing agents helping me keep vacancy down and cash flow up!

You are going to have unexpected expenses.4) if you feel this will benefit you well it's a good way to really understand all the ins and outs of the transactions it can help you lower your expenses (keep the commissions) So the 100K flip can now be worth 3-6% more ...5) It helps to have an LLC and really become a real buisness if you set it up correctly.

Loss of revenue - combined with the payment plans, we are seeing a spike in skip/lease break activity as residents are forced to make sudden and unexpected life decisions.

Investment Info:

Single-family residence buy & hold investment.

Bought fixed, rented, and cash flowing first property, bought the house 2 doors down, fixing planning ( duplex, airbnb, corp rental it?) th...

Vacancy may need to be adjusted-I'm using 15-20% right now.Well that is what I am confused about... how much cash should I put to the side for unexpected property repairs and personal emergencies? 

Thats a bit greasy at best.Thats all assuming that the reason you are pulling out is not because something unexpected was found in an inspection, which would be a totally normal thing if you wrote that contingency into the offer and did in fact not like the results of inspection.EDIT. if you have made offers on multiple properties and more than you can afford accepted, consider taking on a partner or find alternate financing rather than trying to pull out. if they accepted your offers, I would assume that numbers work.

And you'll have new cracks in unexpected places, old cracks that will not close, but instead enlarge.