Next step in property purchasing

I just bought a small house on the northern nsw coast for $115,000 and its renting for a nice $240 a week my mortgage repayments are under $115.
My borrowing capacity is around 400-450,000 but this purchase hasn’t adversely affected my borrowing capacity my broker worked out each purchase like this one will lower it by $15,000 at worst due to positive cashflow,
It’s been set up on a 80% lvr low doc loan at 5% fixed for 2 years
What I am unsure about is wether to buy 1-2 more in that area this year or put it towards a slightly more expensive and lower return property a bit closer down the coast around Newcastle , I can pick something up for around 450,000 and I have just enough deposit $90,000 cash and it will be slightly negatively geared but I would feel a little more comfortable with it as it’s closer to home and I already have a property in that area that has performed well . The new area I bought in is 5 hours out of Sydney and its daunting a lot of the houses are rundown a little (holes in walls and gutters falling apart are standard) but the rental returns are good I have another property lined up there for about 125k with 230 a week rent I’ve had building inspection done and it’s decent I don’t know if I should wait a few months to see how I go with my first purchase or to push on till I get 3-4 more properties in the next 12 months each new property brings and average $100 after mortgage repayments and after all expenses I would be left with around 50-60$ net a week

It’s so hard to personally inspect the properties and I’ve built a good relationship with the building and peat inspector he’s pretty much my eyes and ears in the area, my business partner is a workaholic and when he works I work so it’s hard to get time
Off work. After making my offer and being accepted it took a month and a half to put my deposit down and sign the contract and it still hasn’t been exchanged it should happen this week .