If you are looking for a flip, you need to find a deeper discount.

It's a bit of a challenge to get started but the benefits are tremendous once you have developed a relationship w/investors on a personal level and start delivering on your projects.  

Having these financing options give you the advantage of closing fast on a property, thereby justifying a lower offer.You need at least 25% discount in order to pull out the initial investment when you cash out refi. 

@John ThedfordPeople think that rentals are not glamorous, and discount their value. 

Taking that 2 day prep course should help you tremendously.

Conventional bank refinance will work, IF you got it for a sufficient discount ie. you've paid (all-in) no more than 70% of THEIR appraisal after rehab.

Also, do you typically give family and friends a discount when selling their home?  

volume discounts would apply.

Also, the fact that it is a 4-unit, shouldn't there be a discount since all 4 doors are under the same roof (For convenience reasons)?

If it's the opposite and you budgets 5k but it comes back 10k, use the same process, but if the TOTAL cost is acceptable I wouldn't argue that line becasue you may be getting discount in over items to make up for it... and since total price is acceptable it doesn't really fix anything, just makes more work.