I have an existing website (a few pages) that has manually written responsive markup + CSS, and need it rewritten to use Bootstrap 3, and fix images to be Retina-ready.
The goal is not to be pixel-identical to the current version, small justified deviations are fine. Some changes are even desirable -- e.g. it currently uses <h2> in place of <h1>, small-screens hamburger menu is custom-coded ugly, images almost never use <img>, footer and navbar have layout issues on smaller screens, CSS is hard to read, homepage etc.
Rather, the goal is to have well-written HTML and CSS that is built on a standard foundation and is easy to work with and make changes to down the road. It should take advantage of what Bootstrap offers whenever it makes sense and custom-style or use custom classes for things that don't reasonably map to stock bootstrap.
The current version of the site isn't that, it uses "homegrown" markup for everything and making changes is sometimes challenging.
Finally, I would like to make the site Retina ready on modern browsers (i.e. just use srcset and be done with it). This doesn't apply to various screenshots in there (I'll take care of that), but to background graphics, icons and various other "support" images. Because the huge background image isn't available in higher resolution, making the respective part of the homepage smaller is acceptable (and probably a good idea anyway).
Quoted budget is placeholder. I'm open to using hourly rate as well if you prefer.
(1) Copy of the site files: https://jumpshare.com/v/ImPfw7QZRHTUM0uBRBkL
(2) Original PSD designs (just in case): https://jumpshare.com/v/SyEpUwjw4a9liPzefPZ5