Any advice on how to fund the construction?

[Jason Gettler]

Thank you guys in advance for any guidance!  I posted several months ago about buying my first investment property, a 700 SF 1/1 house I was buying in Long beach that is located in a R2 zone.  We are signing the purchase agreement this weekend and will start the purchase process, 30 day escrow.

What are your thoughts for construction financing? We plan to build a 1,200 SF second primary above a 4-car garage as stage one. We will need about 300k to complete it. After that we plan to refi, pay off whatever loan we took out to pay for the construction and use proceeds to convert the 4-car garage into an ADU and add SF to the main 700 SF house.

I have access to about 100k of the 300k needed for construction of stage 1.  Do we go traditional construction loan or hard money?  Thanks again guys!