An okay plan? 6 months visitor/spousal visa soonafter

Everyone seems to be agreeing with WebyJ so far. However...

WebyJ: "I seriously doubt that they'd let you in to begin with."

"I seriously doubt" = "I don't know and I'm just guessing."

Having visited 40 counties, many times wanting to stay for the maximum they allow on a visitor's visa, and having NEVER ONCE been asked for proof of residence back home, proof of job back home, proof of funds... anything... I wouldn't get too concerned. I've also been places and said '2 weeks' on entry, then decided I liked it there and stayed 3 months - no problem.

Best bet is to ignore all the crap on here and call up the people who actually issue the visas and ask them. Why can't people just say 'I don't know' instead of telling you your plan sucks and spouting off a bunch of worthless crap?

Here's the number for the immigration enquiry bureau: 0870 606 7766. Ask them. Ignore everyone else.

I had a nice witty response posted but I changed my mind. Why ask the IEB when you can read it in black and white from the UKBA website:

Documents Required to Enter the UK as a General Visitor:

What documents do I need as a general visitor?
 
This page explains what documents you should have when coming to the United Kingdom as a general visitor.

They are:

■if you are employed, a letter from your employer granting leave of absence from your job for a specified period - the letter should also say how long you have been employed by that employer, in what job(s), and when you are expected back at work;
■if you are self-employed, evidence of your business activities and financial standing;
■evidence of any property you own in your home country;
■if you are a student, a letter from your school or college stating the course you are on, its start and finish dates, and the dates of the holiday period when you intend to visit the United Kingdom;
■evidence of any family or social ties and responsibilities to return to;
■evidence of any firm travel plans you have made;
■bank statements going back over a period of several months; and
■evidence of savings available to you.

And the penalties for lying to an Immigration Officer:

Part 9 - General grounds for the refusal of entry clearance, leave to enter or variation of leave to enter or remain in the United Kingdom
320. In addition to the grounds of refusal of entry clearance or leave to enter set out in Parts 2-8 of these Rules, and subject to paragraph 321 below, the following grounds for the refusal of entry clearance or leave to enter apply:

Grounds on which entry clearance or leave to enter the United Kingdom should normally be refused
(11) where the applicant has previously contrived in a significant way to frustrate the intentions of these Rules. Guidance will be published giving examples of circumstances in which an applicant who has previously overstayed, breached a condition attached to his leave, been an Illegal Entrant or used Deception in an application for entry clearance, leave to enter or remain (whether successful or not) is likely to be considered as having contrived in a significant way to frustrate the intentions of these Rules.

Not only can it result in a refusal of entry (bounce) it can result in future visas being refused as well as 320(11) applies to ALL visa applications and can also carry a ban from future travel to the UK for up to 10 years.

Now is it worth it? Especially when someone may want to settle in the UK sometime down the road do you really want to blow it by lying? 

PDFTT! 
 

Thank you everyone for your responses. As the OP has received several bits of advice, I'll lock this one and let her decide what she thinks is best.