Sight Seeing and
Frozen Assets are definitely not in any Monopoly rule booklet I've ever read. And I've read more than a few. They have short game variations, but those aren't in those rules, either. While
Sight Seeing might lengthen the game, I can see its point - to spread everybody out a bit and those who start last aren't as badly screwed by not having unowned properties in reach so not only can't they buy anything, but they get hit with rent, too. Ughh. Spreading them all out a bit first is fairer in that regard. But it isn't an official rule. Apparently it's a common enough House Rule, however, that it made the top 5 House Rules - so there's that.
Re-reading the rules is something most people should do, even if they’ve played the game for decades. I swear, most every time I read them, I learn something new, recall something I forgot, think of some new twist, discover I knew the rule incorrectly, am reminded a house rule isn't in the official rules, or have a new or better understanding of the game.
Sometimes I think maybe this is because the rules are not standardized and some variant printings are out there and I’m only assuming they are all identical.
Yep – I just confirmed this inasmuch as two different on-line PDFs of the rules have variations. In this instance, one says any time during your turn you may buy houses – the other says at any time you can afford it and want to buy them.
However, a subsequent rule that allows for the possibility of two or more players wanting houses from a limited supply at the same time implies you can buy houses on more than just your own turn, or more than just only during your own turn, so that’s probably why the new copy allows it at any time as somebody pointed out the logical inconsistency in the original rules.
So, re-reading it just now, I note the following:
The goal isn’t to drive everybody into bankruptcy, but to remain in the game the longest. This implies if everybody else quits, you win, even if you didn’t have the most money or assets.
But by common agreement, short game time limits, or the like, the winner is the one who has the most, even if nobody has gone bankrupt when that time is reached.
And here I naturally thought the winner had to drive EVERYBODY ELSE into bankruptcy in order to win.

In the short game, a wonderful option is to quit when the first player is driven into bankruptcy – and the richest player then wins. I LIKE IT!
I also like the variant you stay in jail just one turn – not three, so treat it as if it were your third time, every time.
I am reminded if one must break down a hotel, and there are not enough houses to do it, they must sell the whole thing and eat that loss since they only get half price for it, even if they would have been able to keep some houses, had there been any.
New House Rule Suggestion: I do like a
Get Out Of Jail Free Card can be used on another player in jail, if they are a willing recipient or not, but I think anyone landing on
Just Visiting should also be able to post bail on a willing or unwilling recipient, too.
I am reminded, also, if you drive somebody into bankruptcy, you don’t just get everything they have – you have to liquidate the houses and hotels (at a loss) – none of this taking over their developed properties crap.