First rental then HELOC

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Hey everyone, so I'm new to real estate investing. I'm in the process of buying my first rental property for $130,000. I am a young kid, just started working and do not have a lot of credit built up. I am going to be putting up 20% ($26,000) for the down payment and then financing the rest through a conventional 30 year fixed. Heres the kicker though, the house that I am buying was appraised for $170,000 the seller just needs the cash asap that is why he's selling the house for such a discount. 

My question is after the sale goes through would I be able to take out a HELOC out on the $40,000 of equity I get from the house being appraised at $170,000 to put towards another down payment. Would the banks be stricter because of my limited credit history/what else would they require?

Thanks to anyone who reads this and all advice is appreciated.