Should I use Multisite?

Hi, I’m fairly new to WordPress (but a developer by background).

I am creating a website where there will be a main site (bluegoldaustin.com) and a single page that will be a home page (austinrainharvesting.com) whose links lead to the main bluegoldaustin website.

One complication is that GoDaddy set it up so that bluegoldaustin lives at a subdirectory of austinrainharvesting.com, so bluegoldaustin.com will forward to the files at austinrainharvesting.com/bluegoldaustin

The theme I’m using provides a non-blog front page with a slider and a layout with 3 images and underlying text. Since we want the front pages to have different images and content, I think I need to have 2 different sites, i.e 2 installations of wordpress, one at root and one at /bluegoldaustin.

I’m not familiar with wordpress multisite? Should I use it in this case or is it too much overhead for this scenario.

Thanks!