That all depends on your current lease and your landlord. If your lease expires this month and your landlord does not want to renew it or has raised the price and you can't afford it, then yes you would have to move. If you are willing to sign another lease or go month-to-month and your landlord is fine with it, then no you don't have to move.
Unfortunately, being pregnant, giving birth, and having children is something that happens every day and does not entitle you to any special treatment in regards to legal contracts.
A builder will typically have a walk through with the buyer pre-closing to go over systems and look for any issues that are obvious. The builder often wil offer a "builder warranty" for a one year period and this can help protect you moving into a new home should your builder provide such a warranty.
That said I have had buyers that insisted on a home inspection by an independent inspector. So everything is negotiable but you may want to see what the builder is offering for a warranty on the home.
Nick you should definately have a professional look at it, i would conduct a moisture test using a moisture meter. you need to assess if it is an old problem or current problem. If old has it styopped, is tehre any damage that remains and how much to cure it.
Depending on the municipality in Delaware County, the taxes could be that high. I know the millage rate in total is just about 2.5 mils, which is a nice way of sating percentage. So, yes, a $400,000 property assessed at $400,000 (Delco assesses 100% of pruchase price) could have taxes in the 9k to 10k range.