I would go for it. Life is short babe. This is from a fellow follower maker of spread sheets, amazon wish lists, budget pages and giant files full of pictures and word documents..
Life is SHORT and it doesn't follow the plan. The best laid plans usually get messed up halfway there and things have a way of working themselves out even when you do something rash.
You don't want to look back 2 years from now or a year from now wishing you had got that puppy you wanted more then ANYTHING instead of waiting forever for things to be perfect.
You have the time, the financials, the knowledge, the room.. right now. There is ALWAYS going to be something stopping your plan from being perfect.. new homes come with less time, new location, new job, new needy boyfriend, new hurdles with your current dogs, new home repairs, ANYTHING. and It will again make getting a new addition feel like "the wrong time" or it might actually BE the wrong time and you will realize looking back that the time when you had the space, financials, and time was the RIGHT TIME and you didn't do it because you were scared of it not being 100% perfect. And that you are in the right place right now for an adult dog and wishing you had done the puppy thing while it was possible.
So yea, this is me..enabling lol