As long as you don't lose money. 

You can lose your butt out here if you don't buy right.

Better to get what you can, than to lose it all.

, it's still highly unlikely that an appraiser would have given value to this bathroom in any case, so we're not losing anything from an appraised value standpoint.Seller should be more than OK with it once you educate them on the fact that of all the offers they are evaluating, yours is the only one willing and able to execute a plan to close on-time, without delay, in spite of the flagrantly illegal and unpermitted bathroom.

@Gerald Harris Agree with these points, especially the emphasis on knowing your market and staying consistent.

Mailing/emailing a notice to "start the clock" doesn't cost much and should be done to NOT lose time if tenant doesn't pay.

I feel sorry for the people losing everything in the fires , insurance will go up .But I wish I was the guy  driving this bulldozer ;t=162s

The seller will lose some rent, potentially incur costs to evict, possibly costs to clean out the units depending on your sales agreement.

You mentioned the following: "Take a look at what markets you are planning on starting in and make sure it is a growing market where the appreciation is obvious (emphasis added)."

I wouldn’t go there myself… you lose a lot of control, your house will see a lot more traffic / damage.