Dear Sir,
We have already worked on OpenCart, so we are quite familiar with it. As per my understanding you want to apply SSL on all website links and need home page fixes.
Just so you know I am flexible in prices, as quality & long-term relationship is more important.
Look forward to hearing from you.
Regards,
YK
LEADconcept
PS: Please let me know, if you want to see some of our recently designed/developed Websites.