Hey Mario, sounds like you've done a great job renovating your current townhouse while saving up and working hard!
Most hard money lenders I've looked at for BRRRR deals like to see at least six months of interest payments in cash reserves after points and other closing costs used for the hard money loan. Another big consideration when doing BRRRR is the chance of not being able to refinance the property after its been rehabbed and rented due to things like too large of a debt-to-income ratio, so be careful of that when looking into refinancing your current townhouse as that would likely increase your debt-to-income ratio.
Some of the best BRRRR deals actually don't require a down payment at all, but you would still need to cover points and other closing costs on the up-front loan and have cash reserves to show the lender you can have some safety in-case things go wrong like underestimated rehab budget or holding costs.
You're doing all the right things, keep up the solid work and good luck!