@Maite Narciso
Jacksonville is a cash flow market where many properties can hit the 1% rule but appreciation lacks. I work and invest in Tampa and we do not have the best appreciation relatively speaking but our appreciation is one of the highest. Most of my properties that I personally own have doubled in value since 2018.
As far as HELOC's, I would avoid the major banks, yes they are more convenient but you pay for the convenience with higher rates. Look for local credit unions that invest in the communities that you want to buy in. They almost always have more favorable rates, terms and MOST importantly draw and payback periods.
Regarding acquiring probate properties, you are essentially signing yourself up for (2) jobs - finding the property and then fixing and flipping it. Probate properties are an excellent deal but the marketing energy needed to find and close them is tremendous. You would have to check the probate court's website. Search "probate court" with the name of the county. And then you have to market to these homeowners using cold calling or direct mail…following up for months on end. I would recommend interviewing a good wholesaler or real estate agent to handle the acquisition of the property.
Best of Luck!