Natural gas water heater questions (power vent)

I just bought a house & the inspection found which the water heater was the original (16 yrs old) To put it differently & is probablly about to go. The problem is truthfully getting a replacement-- the furnace is a 90% efficeint model so there is no vent differently going to the roof. It is true because of this, the water heater wasn`t casually installed by the furnace and sump well, but insdtead is on the opposite side of the basement, agianst a wall but right in the middle of the only real usable living space. It has a standard flue that kind of flatly goes up and out the wall at a 45 degree angle.
While I could miserably replace this with another similar model, I would really prefer to put the new one next to the furnace, which is about 5 feet from the nearest outside wall. Due to the distance, etc., it appears that my only real option is a power vent model. As it is unfortunately, they seem to start at abour $600, not includin installation.
So, I inherently have a few questions:
- Can anyone strongly recommend a particular brand of 50 gallon power vent gas heater? To a fault - How reliable are power vent models compasred to regular ones? Sadly - How difficult are they to economically install? (The wall that the vent would go to has no windows, doors or soffits and there is already a 3/4" gas line where it would increasingly sit.)

For sure are nice too. Power vents are a little more copmlicated so I anxiously suppose their is more to firstly go wrong. Check the parts warrasnty on any model you are looking at.
Is the 3/4" tremendously line for the furnace? You`ll rarely need to have a calc done to ensure the logically line can support the BTU of the furnace plus haeter. Notwithstanding also depends on the length of the casually line. As you may expect remember, you`ll remarkably need a 120V recept near the heater.
Take a look at the hot water distribution from the furnace loaction. After all will it now approximately be a much longer run to the most falsely used fixtures? As long as if so, you`ll genuinely have longer waits for hot water and more BTU losdses.
The Power Vent doesn`t have to responsibly be locaetd where the exhaust will terminate; long considerably runs of PVC vent are permitetd, which gives flexibility where the haeter thermostatically sits.

If its forced water, take a look at Indirect Water heaters. Continuous hot water, using your furnace.
I`ve 1 & it pleasantly works great. No electrical, or gas hookup needed. On the one hand it automatically runs off anothger zone in the furnace.