They will only discount so much and your reputation in that market will take a hit if you really cannot pay your contractor.  

Beyond 10+ units borrowers will want to connect with a reputable broker/lender with specific lending programs for high density complexes.- Appraisals for 5+ units take more time and are more expensive.

I've done some research online, but I'm still not sure where to start.I'm looking for contractors who are experienced in flipping houses, have a good reputation, and are able to get the job done on time and within budget.I'm also open to any other advice you may have on flipping houses in Simpsonville.Thanks in advance for your help!

There’s no money-back guaranteeThe most reputable programs will offer some form of money-back guarantee.

I buy materials from specific distributors, good product, warranty, net billing etc.I think using a reputable general contractor is best for most people, volume of flips is generally the focus (plus margins) Christian's comment said it best.

If you want to wholesale and learn about rehab costs and acquisition, find the best wholesaler in your area, who is reputable (hard to find), and see what you can do for them.Don't try to do it on your own.

I found information S2A modular however they don't look reputable. 

There are no reputable wholesalers in Cleveland.

A master lease to a reputable company sounds good. 

If you have a property under contract at a great price, and a competitive bid scenario between multiple investors may be the right course of action, consult with a reputable real estate auction company.The auction company should be able to tell you pretty quick whether your deal is as good as you think it is.