@Hernando Quintero
You can use funds from your HELOC on a property that you own. No need to draw beforehand to deposit in your account. You'd be paying unnecessary interest on the funds if you do that.
Just disclose that your downpayment will come from the heloc and you’ll be asked to provide evidence of withdrawal later.
Also FHA is only for primary residence. So you would need to prove or convince the underwriter that CA will be your new primary residence.
Just saying you can work remotely now with covid might not work. They might ask you to get a written letter from your employer stating that you are allowed to work remotely indefinitely.
Underwriting concern is that post covid, you’ll have to return, making this a temporary primary residence during covid.
Lastly with the market being super competitor in CA, if your preapproval letter shows that you're putting minimum downpayment via FHA loan might not make it look as appealing as someone coming i. With 20% + down on a conventional loan. Just FYI.