The split is very firm specific.

Seek Legal Advice Reach out to a lawyer who can guide you through the specific laws in your area.

Specifically other wholesalers in the area.

I'd love to go over specific properties with you to see if it's feasible.  

Get some business credits, perhaps amex specifically. 

It comes down to setting expectations; did any of the applicants provide specific, detailed reasoning for backing out? 

Knowing what's "not a good deal" or finding out what they do NOT like, is just as important as finding a "good deal" and having a specific buy box. 

These numbers should be determined using a combination of the historical financial data available, feedback from your property management company, your business plan, and the property characteristics.Generally, you can expect per unit numbers like this:Repairs & Maintenance: $200 – $500 per unitAdministrative: $150 – $350 per unitUnit Turnover: $200 – $300 per unitContract Services: $200 – $500 per unitUtilities: $800 – $1,200 per unitAdvertising $100 – $300 per unitPayroll $1,000 – $1,600 per unit (very market specific)Insurance: (very market specific)RE Taxes: (very county specific)Again, these are very general per unit numbers but they should help provide you with guidance. 

It's not just will the manager handle section 8, it's the specific area. 

In regards to learning more about real estate and maybe how to answer those questions I'd recommend listening to BiggerPockets (Rookie and Real Estate Podcast), there are also some market specific real estate podcast you can check out depending on the area you want to invest in.