Landing Page Builder

We are looking for a landing page builder. We are a mortgage company in the US and we do business in Florida and California. We recently developed lead capture software but we are looking for a landing page builder to help with our different products and niches.

We are also creating an agency that specializes in the real estate and mortgage space so this can turn into long time work.

We prefer the landing pages are built with Unbounce or Click Funnels but we could possibly use Groove if you have experience with Groove.

Please let us know which software above you prefer to build the landing page?
Are you agreeable to $45 for this first landing page?
How much time do you need to build a landing page? (This would have a video, benefits, testimonials, and USP all on the landing page.)
Please provide samples for previous work.