Bought a property in auction, am I spending too much money fixing

[Hussain Raza]

I bought this property for 12k in auction it has two separate apartments (2 different roofs) both are 2 beds 1bath. I rebuild 1 that had a good roof and is renting for $900 roughly spent 32k on fixing it. It was in a very bad shape. The next apartment is in worst shape then the first bad roof and everything inside is very bad too. Got an estimate for 40-45k to fix it all up probably would rent for $700-900. What should i do? I have 15k i can pay right now and then thinking of cash flowing the rest. Ideas? Sorry if this is wrong format first time posting on BiggerPockets. Thanks in advance!