Buying rental property - Refi or HELOC

[Ram Put]

Hello, I am a newbie here and looking for some advise.

I am currently living in my primary residence which is of value around 650k. I still have mortgage balance around 280k .

As I am planning to invest on rental property, I found a townhome which is on sale for 400k and I would like to invest in.

I wanted to know what are my best options here.

I can pay the 20% down payment from the pocket for the new townhome , but i would be in trouble if i could not find any tenant after buying the property as I am already paying for the mortgage for my primary residence.

I am thinking of following options.

- Do a cash out refinance on the current mortgage to have some cash in hand in case I couldn't find the tenant sooner? OR

- Take HELOC and get some cash in hand in case i couldnt find any tenant sooner OR

- Loan from the 401K to have some cash in hand.

appreciate  any advise here.