Nobody seem to be able to smell what I was smelling almost felt like I was going crazy because I could smell this odor.

The smoking claim and odor/damage is valid but most states require that you hire professional contractors in order to be reimbursed for it. 

Hi Denis..I've heard others say an ionizer does wonders for odors. 

The fact that the odor is that bad after only living there for 4 months concerns me greatly about the repair costs when they move out (2 year lease). 

No harm no foul.

Don't know what should be done about the damage/horrible odor.2nd tenant with no pet policy has recently acquired 2 guinea pigs, otherwise they are good tenants. 

We keep a detailed list of what is done on what day and how long it takes.I'll paste in a portion of a move out accounting, you can see that we don't indicate who did the work, us or a third party:Itemized Repairs and Related Losses to get unit back to move in condition:$622.00 Replace carpet and pad (see comments) $24.00 Kilz primer to paint flooring to block pet odor from new carpet $10.00 Purchase and install missing end cap in fridge$300.00 Repaint unit: walls heavily stained $20.00 Replace door jamb in bedroom (materials) $6.00 Replace toilet seat (materials) $80.00 Labor to complete listed repairs and remove carpet Total Repair Cost: $1,062.00Necessary Cleaning to get unit back to move in condition, all at a rate of $18.00/hour: 3 hours to clean kitchen: empty fridge, clean fridge and stove, remove canned goods left, scrub counters and flooring2 hours to clean windows: remove dirt from sills, wash blinds1.2 hours to clean bathroom: scrub floor, remove hair from shower walls, clean sink and toilet4 hours to scrub living room and bedrooms: mop floor, clean walls, deodorize bedrooms, clean baseboards (very grimy)-4 hours for normal wear & tear/acceptable landlord cleaning for one year occupancyTotal Cleaning Cost: $117.00

If you allow pets, even with the click waterproof floor you will have a problem with the odor bc the accidental tinkle will leak between the clicks into those little grooves and it will continue to smell, especially if you/next tenant doesn’t have pets.

It is very junky, has a bad odor, and I saw numerous roaches.

Odor removers like charcoal is probably a good idea.