Welcome to the Q&A Forum

Hi -

http://www.webpagetest.org/ is a great resource.  I also use YSlow (plugin for web browser).  YSlow is great at telling you what's causing the high page load times.  Hope this helps.

I'd say it depends on what current external links they have and what your domain authority looks like.  If you've got a great domain authority, you will definitely help him out.  If the client has no or very few external links, it would help them for you to endorse their services.  I don't think they would be penalized for the link.  It's legitimate and not spammy.

I would do some keyword research and find out exactly what keywords you need to be targeting.  That page has a lot of information about floor plans.  If you're not looking to be ranked for floor plans, consider changing your keywords.  
First, think about the person who is looking for that page.  What would they be searching for?  Maybe "Hawaii Vacation Rental Floor Plan"? "Vacation Rental Floor Plan"?  "Floor Plans for Waikoloa Vacation Rentals"?  My gut says you won't rank for Vacation Rental Floor Plan.  It's probably too competitive.  Really target that page around some new keywords and write some solid content for the top or bottom of the page (maybe a couple of paragraphs above the plans and a couple below.  Create some keyword rich content and you might start seeing a difference in your bounce rate.  Hope this helps.

Thank you so much for your feedback!

When you shut the old website down and moved to a new server, did the URLs change at all?  Did the internal link structure change at all?  If so, that's probably the number one problem.  I noticed the domain authority is only a 15/100 and there aren't many external links to the site.  That could have something to do with it.  If you're targeting the keyword "San Diego Criminal Defense Attorney", you may want to include that keyword more often.  I noticed it four times on the homepage but that keyword is battling against all the other content.  Try incorporating that keyword about four times every 250 words or so.  Without doing a site audit, it's hard to pinpoint exactly what is causing it to rank low.  Just my opinion.  Hope it helps.

Should we structure it starting at the homepage with the user selecting for home or for business, that way they have to make a selection before moving further OR should we somehow differentiate in the navigation using the top menu tabs, dropdowns, etc?

Definitely will follow up with this.  Thanks!

Unfortunately not really. Google will notice it's gone and will dig into the new link structure. You could include an xml sitemap to help the crawlers understand your site, but it's going to take time to gain value in those new URLs.  You may consider (if it's not too late), 301 redirecting the old pages to the new pages and pass some of the old SEO value to the new site.  Those new URLs have no SEO value until people start clicking, linking, etc.  Good luck and optimize as hard as you can. Of course, this is my option and if you get other feedback from elsewhere, I'd love to hear about it.

Hi!  Try checking out this link and see if it helps.  Faceted navigation can get tricky.
http://moz.com/blog/building-faceted-navigation-that-doesnt-suck