In my opinion you should invest for cashflow first to ensure that you can service the debt and properly operate the property even through “tough times”. The way I underwrite this is using a less 10% of current rent modeling which will provide a stress test. Conservative use of leverage doesn’t hurt either.
Appreciation should be a long game focus point. Most successful investors I follow seem to promote a refinance event every five or so years to harvest the equity and build their portfolio. This being said research your markets and find an area that offers both (be careful of the current environment, look at historical trends). Lastly I would also ensure that you save some of your current capital and ear mark it as reserve, if you are using govt backed loans for acquisitions, lenders will require 6 months of reserves for each property (PITI) you own. It also never hurts to have cash on hand to address larger issues that may arise within your portfolio. I hope that this helps you out.