Existing DB & Control Panel upgrade

Requirements
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We need a programmer experienced in PHP, MySQL databases, Javascript, AJAX, CSS, HTML, geo coding & mapping, data integration. Although we have basic technical understanding, we are not programmers or technicians, so are seeking a developer with whom we can interact, and who can suggest alternatives to meet our objectives and budget.

We want to harmonise all our data into the newly acquired lead management system. To manage our leads better and suitably match prospects to property deals, we need to add geo mapping to plot and display, then search properties and interested property finders within a selected radius. For example, we have a property in Bradford BD1 - draw on map a selected radius (say 10 miles) of property’s address and display all buyers’ interested areas (say Bradford: BD2, Bingley: BD16, Halifax: HX4, Leeds: LS20), listing and reporting details of these buyers, graded by their match criteria.

This will require
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1. Amending LMS SQL tables – adding extra fields
2. Amending LMS search functions – adding new search criteria
3. Amending LMS UI template – new data columns
4. Adding to LMS a csv/excel export function – for data output
5. Create new webforms for our existing websites to add data to LMS (using iframes)
6. Amending existing website action scripts (o continue sending data to central db (uses php) and external programs (ActiveCampaign uses php Curl and Batchbook uses http post)
6. Installing new lat/long lookup table (data already supplied from Ordnance Survey by postcode and city/town)
7. Converting existing databases to include new geo coordinate data
8. Add geo mapping display and search feature – to display and report properties and locations buyers are interested in.