Use a mortgage calculator to work out how much difference your annual bonus makes to your mortgage. Depending on the size of the annual bonus, and how much of it you want to use against your mortgage principal, you can save money in terms of interest you won't need to pay. This reduction shows up because you are paying the loan off faster that your mortgage.

It's better to have someone else do it though. The people who do this for you will very likely be happy to show you some clothing that will fit you afterwards. It is ok if you don't find anything you like (or can afford). It would be nice if we could get it to act up and do some testing but I suspect you have a bad multifunction switch on the steering column, if front and rear are stopping together along with the indicator. If you just had one bulb going down I could see it being a ground or bulb socket issue, but if you're losing the whole side I don't think that will be your case. The brake lamp switch is wired to the multifu