Affordable Multiline Phone System for Small Biz? <$1000?

I need a 3-4 phones set up with: (1) voice mail for each phone, (2)
ability to transfer calls to any of the other 3 phones, and (3)
ability to use all 4 phones to dial out at the same time (hence, have
separate phone numbers per phone).

I was quoted $1000 - $3000 by 3 individuals to set up such as system.
This seems kinda expensive for a small 3-4 employee business. This is
my first business btw. I didn't realize a multi-phone system was so
expensive and underdeveloped compared to computer systems/networks.

What system should I get under $1000 with all 3 necessities stated
above?

I'd prefer not to have extenions but if that's the only way to stay
underpriced so be it.

P.S., Would a Nortel (now sold to Aastra) Venture 4 phone setup work?
How do these Venture phones work? How about Meridian phones?