You can make the Raymarine package cheaper by getting the e7d (instead of the e7) and standard Raymarine transducers for depth and speed that plug directly into the e7d.
The list of compatible transducers is found here:
That will also get you fish finding displays instead of just depth displays. The fish finding displays are a lot more useful.
The cheapest way to get wind with Raymarine is the i40 wind package, which is $400ish. You will need to run a wire to the masthead, but it saves you a lot of money so I think it is worth the hassle. It is also something that you can add later.
If you want to do this a little bit at a time I'd start with the e7d and a transducer. Buy the plotter without charts since it looks like Lighthouse II will allow you to use free charts from NOAA instead of buying expensive ones from Navionics.
I agree that I'd go with VHF+AIS RX instead of a AIS transceiver. Standard Horizon makes good radios for this.
If I were building a Simrad-based package I would use the B&G Zeus as the plotter, it has some nice sailing-specific features. However I've had bad luck with Simrad customer service and great luck with Raymarine customer service (see my other thread on this) which would make it hard for me to recommend or consider Simrad.