I'd recommend vb 3.8.10 it supports the latest php, and doesn't include all the bloat vb4 and 5 have. as far as hiring someone, request in the paid section and go with someone who is recognized on here. and you believe can truly do it, paypal is the best method to provide payments, DO NOT GIFT THE PAYMENT! or its like you donated and it's harder to get your money back so keep all conversations.
pro tip to save some $

upload the files, run yoursite.com/install/upgrade.php