Transfer the calculator to a new hosting/server, modification of the Yii2 PHP code

There was a calculator hosted on a foreign server (OVH) - there are all sources - it is necessary to transfer everything to the Russian server (preferably running), with the configuration of the mail server (seems to be on Google).
The sources are there.
It is also necessary to refine the code of the calculator itself (minor changes - in style - so that when you select an item, a calculation is now made, and earlier a message about the impossibility of calculation pops up). Such edits - 4 pcs.
As for the price of the work - I do not orient myself, please offer options if the specified budget is small.