To drop PMI and use a convetional you'll most likely need to finance at 80% LTV meaning the property will have to appraise at $421K (and you'll have to pay loan costs out of pocket). if you're living in the building your best option (imo) is to get a high LTV heloc. you don't have that much equity in the building yet it doesn't sound like but some HELOC loans go to 90% LTV (although be warned they will sandbag on the appraisal much harder) 

HELOC probably makes the most sense here.

If your interest rate is below the rates available today, I would consider getting a HELOC on your home.

You can also get a HELOC to get more equity out of the property, typically up to 90% but your rate will vary.

Include the option to role into the new loan any HELOC that hasn't been drawn on in more than 3 years. 

It’s worth around 1 million now and could rent it out for around $4,000.I’d like to get a duplex in the east bay using a HELOC for the down payment and was looking at places for around 700ish in price.I’ve been told that I’ll get better loan terms if I move into the duplex I buy in the east bay and turn it into my primary residence.

A few options:Sell a car, refinance a car, finance a paid for car, borrow from family or friends, borrow from 401k, heloc, hard money lender, credit card.

I’m interested in buying a 50k-100k property with my HELOC.

I bought in 2014 and made many improvements, Since I'm located close to a beach I decided to rent it out for high season (jan-april) and save money by staying with family in the meantime.With that said, I decided to take a 100k HELOC out on my first residence due to the amount of equity I had and have been looking for a multifamily relentlessly.

I have a HELOC ready to go and am currently working with a realtor.