Inspection findings can also distort the cash calculation. A minor-looking issue may not stop the purchase, but several small jobs immediately after closing can consume the reserve surprisingly quickly. I would separate known repairs, vacancy cover and a general contingency rather than counting...
MX$702,000 is roughly 6.5% of the purchase price, but that percentage does not tell us whether the buffer is comfortable. The useful comparison is against essential monthly spending and income stability.
I would make three lists: cash that must remain untouched, costs due in the first 90 days...