Search stored entries with jQuery autocomplete(Paid plugin)

I'm willing to pay for this customization!
I need for Formidable single line text field to work with jQuery autocomplete / Ajax when search already stored entries.

1.Start search after is typed 3 characters and display first 5 entries in the starded dropdown.

2.To work autocomplete on mobile devices.

3.To not display duplicates(My customers add Cities in the form where they submit theirs entries, in 2 of the fields) so when other customers will use the text field that work with jQuery autocomplete/Ajax as a search form to display only once the name of that retrieved city.

4.On the single line text that will work with jQuery autocomplete/Ajax to can be used for example [ get param=departure ], so in that way I will can use a Formidable form with 2 fields that work with jQuery autocomplete/Ajax like a search form(Departure & Arrival).

5.The field to can have a desired placeholder.

It is important to support this addon in time, think that I'm in the 4th year with Formidable as paid customer.

I'm agree that you as developer to can sell this addon to other customers too(in this way will be profitable for you to offer upgrades in time for this addon).

I will pay annualy for support(updates) for this addon.

For me is important to works your Formidable addon after WordPress  & Formidable Pro upgrade, so to support this addon is very important to me and my customers.