Land contracts for fix and flips?

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Hey guys, I'm new to BP (been reading for a long time but haven't posted yet) and to REI in general. Anyway, I have a question about a possible strategy that I don't really see many people talking about. I am going to start doing fix and flips to build capital (my long term goal is to acquire rental properties). In my area, Indianapolis IN, there are many distressed and abandoned properties that are sold with a land contract (I actually bought my primary residence this way). What would be the downside to buying properties on a land contract, rehabbing them and selling them (other then the interest which is usually 6%)? BTW I will rehab myself so costs are much lower. The properties I have in mind are asking around $20,000, rehab costs around $6000 (basically just materials and permits etc) and ARV should be around $45K. I do have enough money saved to just buy the property outright but honestly I'd rather not have the majority of my savings tied up in 1-2 projects. Just trying to fine tune my plan here and looking for some opinions! Thank you in advance!