Dietary Concerns: Living on a limited Diet for Budget and Health Reasons?

I'm on a very limted budget ($1000 a month) and I'm trying to save time and money while losing weight.
I've devised a plan that involves eating the same meal 3 times a day (which doesn't bother me), but I'm concerned about the health effects. The meal consists of one Ensure (dietary supplement drink), one Power bar (a health bar) and 3 tablspoons of Peanut Butter & Jelly blend.

Here are the figures:

Total Calories per meal: 710
Total Fat per meal : 17g (5g saturated fat)

Vitamins & Minerals (per meal, in %DV per 2000 calorie diet)
A-25
C-100
Calcium-45
Iron-55
D-25
E-125
K-25
Thiamin-75
Riboflavin-25
Niacin-75
B6-75
Folate-75
B12-75
Biotin-75
Pantothenic Acid-75
Phosphorous-40
Iodine-25
Magnesium-40
Zinc-40
Copper-40
Selenium-25
Manganese 60
Chromium-25
Molybdenum-50
Chloride-6

Daily figures for these would be x3, so I'm getting plenty of my vitamins and 2100 calories.

Are there any concerns for this plan over the short, medium, and long term?

I forgot to list the Protein content. Its 27g per meal or 81g per day. Is that close enough to 90?

I have read of actors struggling to be famous staying on a PB&J sandwich diet for a while, thing is, you don't need only vitamins and minerals, but also soluble fiber (like the one in fruits and vegetables). You might do it for a while, but not as a long-term diet. You might want to add some real protein, like eggs and some fruit or salads.

Fruits and vegetables provide lots of vitamins, minerals, phytochemicals and fiber. It is difficult to imagine being healthy without eating lots of fruits and vegetables, if you find a certain fruit or vegetable you like in the store, buy it and eat it.

Healthy polyunsaturated and monounsaturated fats such as fish oil, canola oil and olive oil are good for your health, and the brain feeds itself from them.

Soluble fiber aids digestion and is needed to keep a healthy colon. You might get constipation problems after some time.

Not enough protein- you need about 90 g a day