Telesales for accountancy practice

I am a sole practitioner accountant. I have very recently sent a mailshot advertising my services to c 800 local new startups from a high quality database (I am based in North London). Many if not most of these will not yet have a permanent accounting solution in place, so I am very confident the latent demand is there, despite the daily business naturally being their first priority. I am looking for someone experienced in telemarketing on behalf of accountants to follow up on the mailshot with all of these businesses (with an agreed loose script) to obtain email follow ups and most importantly warm leads ie appointments.

This is a fixed+ price project, £200 base + £50 per appointment arranged. We can also discuss a bonus for conversion of quality leads.

(so on a 25 calls per hour basis and 1% conversion rate this equates to £600 for 32 hours work, 2% conversion = £1,000 etc). My experience to date is 2%+ is very realistic.

There are lots of follow up work options for the right person, with me and my associates.